WASHINGTON (AP) — A shirt with a rainbow flag. Clothing that says "Make America Great Again." A National Rifle Association T-shirt. A pin that says "#MeToo."

Those were some of the items Supreme Court justices wanted to talk about Wednesday during arguments about a Minnesota law that bars residents from wearing political clothing at the polls. Wearing their all-black robes, the justices spent the hourlong arguments pulling out hypothetical outfits and discussing whether Minnesota's law goes too far in telling voters what not to wear.

Most states have laws restricting what voters can wear to th...